Find the variance of the given
data.
147, 141, 120, 124, 128

132.5

Step-by-step explanation:

First, find the mean of the numbers given.  To calculate the mean, or average of any number set, add up all the numbers in the set and then divide that sum by the number of numbers in the set.

The mean of this given data is:

add up all the numbers: 147+141+120+124+128=660

there are 5 numbers in the set, so divide the sum by 5: 660/5=132

The next step in finding the difference is to subtract the mean from each number and square each resulting difference.

147-132=15^2=225

141-132=9^2=81

120-132=(-12)^2=144

124-132=(-8)^2=64

128-132=(-4)^2=16

Finally, find the mean, or average, of the squared difference.

add them all up: 225+81+144+64+16=530

the only difference with the division is that the divisor is the number of numbers minus 1, so in this case 5-1, which equals 4

so, now divide: 530/4=132.5

So, the variance of the given data is 132.5

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer